I work full time, am married and only have 1 project I'm working on. I used to work 4 day work weeks. This was
wonderful in terms of productivity. My body and mind was used to 11 hour days, so when Friday rolled around I slept in an extra hour 'til 6:30 (yay!) and went crazy. The only problem, was a lot of it was poor. I'm a sys/network admin by trade. So for me to sit down and work on code with databases, it wouldn't ever come naturally. One way I increased my productivity was I went to Openshift as a platform. My day job/natural line of thinking then became irrelevant.
Then I switched to 5 day work weeks and began commuting with my wife. We only worked about 10 minutes apart but were 30 minutes each away from our place. This gives us 30 minutes of pretty much one-on-one time where we can sit and talk to each other. Or just space out together. It's really quite wonderful. It also keeps in contact with each other more... because if she has meetings or something comes up, we let each other know. Before we'd rarely send text messages to each other. Now, it's a bit more frequent.
I only work on 1 project. That seems to be a general consensus here, and it's fairly relevant. Everything I work on stems from this single item. If I want to design, I do it. If I want to develop, I do it. DB stuff? Done. Want to do sys admin stuff? Save it for work tomorrow.
One thing I never do though, is neglect my wife. If she wants my full attention, she has it. Doesn't matter if I haven't ':w' in an hour and my laptop is about to die. I push it aside and focus on her. Life become copacetic.